That's a nice way to avoid scams, but the cost doesn't seem worth the benefits to me as someone who otherwise has good awareness about scams. I've made some nice friends off the internet and yet to fall for a scam, so it doesn't seem worth locking out that possibility of friendship just to reduce the odds of being scammed slightly more.

I could easily see giving very different advice to a friend with less scam awareness, though (like an older friend with limited knowledge of technology).