Theyve already said this wouldnt be happening many times so its kinda pointless to be discussing it on new threads every few months, same for every other rejected idea that people try to bring up (1v1 tourney, NGS, monthly gsts, etc;)
If classic were to put in a trading system though, it'd make sense since all other graal games have it; as do most MMOs. I don't think the other servers have hat trading either, maybe zone does so even if it was just bomb skins/ganis etc; it would still make sense as you can trade those sorts of things on other servers
i think i'd also personally prefer it to be a profile based system instead of tables, this would probably mean less lag? and you cant stand still with text anymore which means no advertising items you want to sell. Theres a similar system with easter egg trading. I'd like something like that and you could just disable trade requests in settings if you didn't want to trade.
New players running around with old hats also doesn't bother me, all these items are purely cosmetic and offer no advantage over me in a spar scenario. could easily just prevent event/1k/gst hats from being traded if it was an issue, this would also probably prevent alot of scamming since these would be the most highly demanded items
edit: for the negative, goat provided a decent point that multiple account abuse and basically merging of accounts (could send the items but not the stats) would be an issue. classic already has problems with scamming so that would probably increase. trading is also just completely unnecessary. seems like a lot of extra effort/lag and distraction from more impactful projects when there's no actual gameplay impact. these items are purely cosmetic, not actual melees/weapons like in the other servers.