QA folk are protective of their logins, and rightly so. We create users to test with, and expect their accounts to be in the state we left them in. It's not convenience... it's essential.
But Devs will ask you for a login to this server, or that server. So send them the link to the wiki page that describes how they can create their own logins, and even walk them through it if need be.
But if they still come asking for a login, try creating, and sending them a login with the username "lazydevs". Problem solved :)
Sometimes the passive-aggressive solution is the right solution.