Off-switch

i agree with her - if you can stay unspoiled, stay unspoiled.

as it happens... the first blake's 7 fic i ever wrote was to this exact spec: http://archiveofourown.org/works/640690 (it has various pairing tags, but it is super gen)
and because i am addicted to it as an idea, i wrote a gambit scene in my elizabethan seafaring blake/avon... but that is spoilery. and not gen.

the master of the avon and vila gen friendship fic, though, is vilakins. here are some that aren't spoilery (i'm pretty sure. there may be some dramatic irony, she's good enough that you may not see it if you dont know to what it refers...)-
http://archiveofourown.org/works/137873
http://archiveofourown.org/works/27059
http://archiveofourown.org/works/46674
and a fun star trek: TNG crossover, if you enjoy that sort of thing: http://archiveofourown.org/works/61121