Sounds like you are too.
If you get that upset over a reaction emoji, don't log on, for your own sake.
To be frank, I've been on GTP since 2006 and this site used to be a lot more civil and constructive before the fakebook/reddit/insta style reaction emojis got added.
If you like a post or someone is particularly helpful, you have to reply. Even saying "thanks" or "didn't know that before, that's helpful" means a lot. Conversely it's a lot harder to simp a post just because someone is a famous poster (not necessarily because you understood or agree with what has been said). I've seen mega essay posts made by a few prolific members get so many likes when I know most people who liked it probably didn't even finish reading the whole text. Often the same people who liked the automatic news article OP then ask a question in the thread when the answer clearly have been explained in that article itself.
There's also the ambiguous "haha" which sometimes I'm not sure if the person is being sarcastic, or they really found the post funny.
And of course the poo. Back in the day if you dislike a post you HAVE to type a reply. It takes effort. Even a one word reply is still more than just a click. More importantly, it always shows something about the person disliking the post and you can tailor your reply accordingly. It's one thing not liking a post because it gives a wrong info and you're going to correct it VS not liking a post because it's abrasive/abusive VS not liking a post just because you're biased against the poster. We still get multi page arguments but at least it's a slow build, and often self contained between 2 people. Now when you see a poo'd post, others are just so quick to dump more poo, and the situation escalates quickly. The person feel insulted, poos the others, and so on. It's just an easy "hit and run" tactic to stoke the fires of hate in a forum.
Anyway, I'm old. But the internet can be such full of hate and tribalism because it's anonymous, we don't need to facilitate it even more. GTP used to be a reasonably safe haven but some subforums with lower average age are just devolving into mindless social media cesspool now. You told him not to logon if he can't handle an emoji, well maybe if you can't be bothered to type even a one sentence reply you should just stick to other social media instead of a forum. This is a place of discussion, not hot takes and overreaction.
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As for the thread topic. I don't know off the top of my head what a decent GT-One laptime around Spa in GT6 is. If it's fully tuned with RS tyres it's not gonna be realistic anyway (let alone with GT6 physics which is often faster than real life). The driver is a known fast driver and the lap looks clean. It's sad that OP chose to dig up a random lap video from 6 years ago to prove his point. We know hybriding exists in these games, and when online was still available I couldn't recall an instance of cheating. Now the game is offline anything is fair game. It doesn't harm anyone.
As for why people cheat in video games, same reason why people cheat their way to any result. They want the fastest and easiest route to victory/riches/power/whatever. If you care that much about winning, join them. If everyone cheats the playing field is levelled. If you care more about integrity, then just ignore them and compare yourself to others who do not cheat. GT games have always been good at anti cheat measures so I'm not worried. Occasionally there are egregious track limit loopholes but PD has always been quick to rectify them in GTS/7. We have lots of fast drivers who watch each others' replays so anybody doing anything fishy will get noticed very quickly. And once again, this doesn't apply to the older games where mods and hybriding exists. It's all just in the name of fun and experimentation.