I have casually researching them over the past year or so... im scared for our lakes. Especially with me enjoying fishing and all. If i ever see one in my lake, ill likely beat the hell out of it with a bat and throw it back into the water as an example for the others (even knowing that this will accomplish nothing).
As far as what they taste like... im sure its good smoked. A lot of not so good tasting things are good smoked though. If and when they get into our lakes and if im still around at that time, its going to be sad to not be able to pull a walleye or perch out of the lake and just cook it for the flavor that it naturally has.