Size is all about compiler options I've used, McAfee detects nearly all mining software as a virus.
Anyway,you don't trust - you don't use, simple. It's not my daytime job, it's done for community.
Well, instead of thinking everyone here is newbie, you could tell us that you static-linked all libs or something.
It's not about trust, it's about safety.
Doing something for ppl is always big + for me :-)