Why not? It improves solidarity. Actually when I worked at Microsoft doing tech support, I got pulled off the phones to help with sudden mandatory tech support rotations due to virus outbreaks. It was great to see marketing managers have to help people assess whether their systems were infected and apply appropriate tools. I would take escallations but generally people did a good job. (Oh and these people showed up with very little training on customer service or tech support so that was fun).
But I think one thing that Microsoft got out of it (this was in 2002-2003) was a stronger sense by everyone why it was important to focus more on system security. I think this improved the company and lead to better software.
> Especially since I've been in positions where I have been on tight deadlines.
If management know of the rotation, they will have to adjust the deadlines. How many deadlines are really necessary beyond a simple measurement rationale? Management can usually adjust as needed, or reschedule the rotation to a better point.
> With me, it's difficult to move from customer service right back to software development/engineering.
Isn't the point though to ensure that people are engineering and developing software with customer service in mind?