Not sure if it's a cultural thing but most of the traders in my home jurisdiction, once you've done a trade on any of these platforms, we then exchange numbers and port over to a messaging app (wechat, whatsapp, telegram, depending).
I'm the same, but usually not until we've done a handful of trades, maybe between 5 and 10, and I feel I can trust them while cutting out the escrow that Bisq (or the other platform) provides. It allows us to trade more easily with each other since we will accept zero confirmation transactions, we can trade higher volumes, and we will offer each other better rates. Although by doing all this, you obviously increase the risk of being scammed since there is no escrow and no platform to seek recourse from.And I only use Signal since most other messaging apps are terrible for privacy.
Ah yeah, of course, absolutely not on the first or even second/third trades. I also tend to mark those who use their real names and don't do third party, and who've got years of experience (as shown by really old trades) then you know it's the same person and same account.
Definitely makes sense when you need someone you know can do an instant tx with the same bank/method, and do big volume or high frequency. Negotiating prices always best too. Like you said, though, not recommended for first-timers... you kind of have to be in the business a long time to know who's got the most to lose by scamming.
Yeah I'd recommend Ricochet also for privacy but I think Telegram/WA is the best of both worlds for me, we're not exactly anon where I trade =)