No, doesn't sound too out of taste, could be good as a portal for information about an ingress effort into the CONUS to followup on the previous tactical "feeling" missions which were carried out with a relatively high level of success in the last 15 years... (9/11, WTC v1.0 in early 90s, OKC, etc.)
I doubt a traditional fullscale invasion portal site would be very sticky in the short term since overall US defenses (for CONUS) are reasonably high, but in terms of a continuance of the viral, guerilla type of small-scale pinches, I think that we will definitely see more.
As for it being in bad taste? Errrrr... that's a matter of opinion - there are far more contentious domains being exchanged here on a daily basis. Me thinks there is no problem with a member participating with a display name of invadeusa.com.
All IMHO and not representative of anyone else - personal or corporate entity.
Rob