Just my two pence worth and I am no expert by any means and neither do I profess to know Linux inside and out but . . . . .
I don''t see that you'll get too many replies saying it's not 'safe', I imagine it'll be the exact opposite.
As for 'back doors', I know where you're going I think, and again, don't see you'll get many negatives, the nature of open source
means there's slim probability that anyone could throw something dangerous into the mix without at least a few people round the
world cocking their heads to one side with a curious stare !
Lenovo ThinkPad T61 LM14 & 15 (different HDDs) Intel T7500/2.2GHz/Cinammon 1.6/1.8 Intel GM965. Toshiba Satellite M70: Dual boot Zorin OS & Elementary.Desktop:LM13/15 Geforce 9500 GT, Athlon 7750 Dual-Core 2700mhz,3gb RAM.Linux Registered #562462