[wp-hackers] Activating another Plugin when Activating a Plugin

[Scott Kingsley Clark]

Just checking in here, has anyone here ever attempted to activate
another plugin (or ensure it's activated, if not, then activate it)
within a plugin? For example, when activating Plugin B, the Plugin B
will activate Plugin A first (or if Plugin A is activated, continue;
if Plugin A doesn't exist then send error to browser), then complete
the rest of Plugin B specific activation.

I have the craziest of thoughts!

-Scott