Whenever a non-roleplayer spies/awoxes/scams, you see a lot of threads in places like Crime and Punishment that outs all of that player's alts. I'm not sure why a roleplayer who conducts such activities should receive any sort of special protection simply on the basis that they roleplay.
I bolded and underlined the question I think is at the heart of your post. The short answer is "No"; if you steal actual, mechanical assets, you have engaged in a form of meta gameplay that is inherently deceptive and untrustworthy. If a roleplayer pulls a heist off on one character, reasonably speaking I shouldn't trust other characters played by the same player with assets either. It is the player who engaged in the meta gameplay, not the character. That's not to say the player is some sort of foul, evil person, but it simply wouldn't be wise to give them access to valuables anymore.
Hmm, I kinda see EVE as a poker game: deception is expected, even among friends you can trust IRL.
I can understand the OOC name and shame, but I'd hate it if Ché loses all IC credibility just because there's OOC knowledge that his player has a spy/thief alt. To me, it feels like a char not getting into TS-F because the player also plays an mission alt that does incursions, or a Matari char not getting into TLF because the player also has an Amarr Holder char. Or Ché not walking into somewhere because I see, OOC, that Ava is there waiting to punch Ché in the nards.
I would prefer it if the RP community people trusted I can keep my characters seperated until proven otherwise.
What does it matter if it's "actual, mechanical assets" instead of an IC secret or asset. Why is it not ok if someone steals "a mere 2 billion", when it is ok if someone reveals character X's big dark secret, or abucts her daughter to sell as a slave? I can blow up all your ships and crew and all will be well with The RP Community, but steal
one, and I'm out?
As someone whose interactions are 99% IC when logged in, I don't see why I couldn't RP a spy/thief without metagaming, but then again, I never tried it yet, so I guess there are some things I have not thought about?
Is there no spy/counterspy/sabotage thing going on in FW RP corps or other RP enemies?
So...is Ché's trustworthiness affected now you folks know that I, the player, am cool with the spy/thief thing?