Obvs. I use the scheduler and haven't had any problems but I noticed after friending the account that I buy on that it stays logged on for hours after I've set the stop time. It'll stop auto buying and refreshing and stuff but the account is still logged in. I don't know for how long exactly it stays on because I just went and stopped Abrosia and I'm guessing that this isn't a new thing and it's done this all along, I just wasn't friends with the account until now and didn't notice.
Also, I searched the forums for topics about the scheduler but most everything I found was geared specifically towards how to set it up and how long to use it. This is probably just a case of me being completely ignorant about how the program works in general but I would really appreciate it if someone who knows about the mechanics of Abrosia and how the scheduler works could let me know!