I agree with you Ocnor that some of this stuff is fairly obvious and should be understood, to people that have the experience. However, the nature of the original posters question led me to believe that some of these may not be known, which is why I chimed in.
As far as bridging goes, very few amps are as efficient or run as well in bridged mode as they do when operating independently. In addition to that, the more affordable amps (especially the $2k and under ones) are typically more prone to these types of issues. It is important to remember that overdiving an amp stage is a quick and easy way to blow speakers. Combine to that the bridging MIGHT be way more power than this user needs, the amp may be a cheaper one with poor output conversion, and bridging all of a sudden may be a damaging and expensive trap. In my post what I reccomended was checking these factors. I never recommended to NOT do what you suggested, but just to make sure of a few things first.
As far as speaker impedences, I can't remember an amp off hand that runs bridged at 2 ohms. 4 ohms seems to always be the spec. Now with the tops, I agree that you probably aren't very likely at all to run into a 2 ohm cabinet. However, with subs, 4 ohms is certainly not all that uncommon. You reccomended linking two subs together on a bridged amp. If these subs happen to 4 ohms a peice, you would be putting an extraordinarily heavy load on a quite possibly cheap underbuilt amp that may be running to a cheap sub with a driver not capable of dealing with mismatches and overs very well. End result here could be both a toasted amp, blown drivers, and especially with a shoddily designed amp, you may even manage to light a sub driver on fire if the amp opens to DC on overload.
In the end, I was not saying that your advice was bad, just that without having all of the proper information that your reccomendation may cause more problems than it would solve.
As a point of reference, I have only been doing live sound for 12 years now. However, I run a live sound comapny, work for a couple of larger ones, privately contract with bands and have done at least 1000 shows now and worked with well over 3000 bands in that time. Basically, this is what I do for a living, so all of what I have said here has come from repeated experience.