I'll still pick mushrooms if I find them and am absolutely certain what they are.
That's my point precisely! I'm 100% for more natural food sources and foraging (maybe not so much foraging in the air pollution of West London) but with fungi you really need to know what you are doing and should never take chances. Our foraging ancestors would have had an encyclopaedic knowledge of flora and fungi built up over many centuries - we have Tesco! (Or Waitrose if you are posh..).
Sounds like you are planning the fungi version of Russian Roulette. I only eat mushrooms wrapped and labelled from Tesco!
And you feel confident about that after the horse meat scandal?
Nope, definitely not found any horsemeat with my mushrooms. You do really need to be 100% confident though with mushrooms, even the experts can get into trouble. Maybe get someone you could live without to try them first?