Well, it's not always that easy...
As an example:
Alcohol's activation revalidates the proper license with every 14th program start after a successful validation. If you refuse A120 to connect to their servers for a specific amount of tries after the 14th start, it will will deactivate the application by itself. You'll then have to contact the support to get your software working again.
I don't know if this is similar with PlexFools XL, but I am afraid that a firewall is not always the answer. Activation is bad and noone should ever buy a software with such a protection scheme. :iagree:
However, I don't need expensive automated testing features, I have a very well working open-source freeware alternative running right now, although I am still fighting the magic hand.