I'm pretty sure that is not the case here, or at least not completely. These are people I never met outside of Facebook and I initially got involved through IRC

I'm pretty sure that is not the case here, or at least not completely. These are people I never met outside of Facebook and I initially got involved through IRC. They certainly never had my phone; besides, it had changed from my old Dutch to new UK number anyway. My email has been stable for some time, but I never used it to communicate with this crowd, I'd consider it unlikely that it matched there, too.