Best way to recruit for new FC?

[Amiaze]

It's extremely intrusive and it reeks of just wanting to fill the FC with whatever warm bodies happen along, honestly.

Grist for the mill, as it were.

As I said, this likely varies. The few people I've sent tells to were new players that I thought needed help and, in my case, they messaged me back and thanked me for sending the message and not just outright inviting them without a word. But, to be fair, some of these were players I'd encountered before and had helped kill a mob that was chasing them while on my way to do something else, or some other random event.

I don't disagree with what others have said at all - especially when you're just looking to fill an FC with warm bodies, as you said. A short and thoughtless "need an FC?" is way more intrusive and spammy than a well thought-out message targeted for an individual player standing right in front of you, as was my case.