They all rely on the savvy of the user. My D explained some lines that are giveaways that one party is out for a hookup. In fact, my 70 year old friend had to be corrected in some of her own wording in her description. I’d bet some of this lingo shifts over time.
Yes, in many cases, you need dialogue, first. Online and by phone.
As for scammers, I have a friend being scammed now. He’s in love. He’s going to marry this guy, when the guy comes back from a military stint. In less than 5 minutes, online, I learned this guy is married and shows up on scam alerts that his photo is known to be misppropriated by scammers. I can’t tell him anything, without a row.
But c’mon. Have the condom conversation. Pronto.