Frustrated by long airport-security lines? Certain those screeners aren’t paying attention? Wondering why your grandma always gets frisked? The federal government wants to hear — or at least read — your gripes at the “Evolution of Security” blog the Transportation Security Administration introduced Wednesday. And it promises those complaints and suggestions won’t vanish into thin air.

The blog, at http://www.tsa.gov/blog, is getting a rather “blah” response from aviation analysts and passengers advocates who say it will do little to improve process or perception.

“This will just make it easier for them to receive complaints for them to ignore in the name of national security,” said David Stempler, president of the Air Travelers Association.

In the blog’s initial post, TSA Administrator Kip Hawley said the goal is to provide a forum for the agency to explain why travelers must go through certain steps at checkpoints since interaction at airports is often harried and halted, resulting in “feedback and venting … circulating among passengers with no real opportunity for us to learn from you or vice versa.”

“We will incorporate what we learn in this forum in our checkpoint process evolution,” Hawley wrote. “Our postings from the public will be reviewed to remove the destructive, but not touch the critical or cranky.”

Terry Trippler, a Minneapolis-based airline expert, applauded the idea but said TSA “was in the right church, just not the right pew yet.”

And that church could become anything but sacred. Trippler said he envisions the blog quickly degenerating into an online vacuum where a handful of habitual complainers force TSA officials to respond to them, while other self-appointed security “experts” pontificate on the best ways to improve the process.

Even worse, he said some travelers will avoid the blog for fear of retribution from the government.

The TSA already is fighting an uphill battle in the court…