People aren't robots. I quite like to have my personal email open just in case anything urgent comes in. I like to have my personal github logged in, just to see messages.

I'm still producing my work, in fact I'm so far ahead of my colleagues, that I can take entire days off because I'm delivering early.

If somewhere told me I flat out couldn't use personal accounts I'd tell them to f- off.

Also - work is give and take - if work is not going to "give" a little, and let me use personal accounts, then I'm not going to "give" you some extra time when production goes down out of hours, or there's a big push for a delivery.

Anywhere that's this inflexible is a crappy place to work, tell them to get bent.