Probably licensing/contractual issues, same reason there was no Mac/Linux on computers when I worked for the Federal government (there were some Sun systems running a proprietary OS for certain logistics workstations, but that OS and the programs were designed under contract for that specific purpose for use on secure systems).

“Although I like the image, it seems too generic.”

Welcome to the government. Also probably designed on contract and approved by a panel of people that know nothing of graphic design.

“Blogging via pseudo-first name aliases removes some of the trust (and accessibility) from the bloggers.”

On the other hand, it gives us the same lack of accountability and transparency in government we’ve come to know and love since the Truman administration. Interesting that they censor any information regarding the identity of public-sector employees (when such information is a matter of public record, those employees being paid from the public coffers and serving [ostensibly] in the public trust). Same reason cops wear masks when they burn down houses, I guess.

If you want a blog about transportation security, I suggest starting with http://schneier.com/blog/
Maintained by noted cryptographer and security expert Bruce Schneier. You might remember him as the man who popularized the term “security theater,” which (by its own admission) is what the TSA engages in.

For a laugh at the government’s expense, check out http://stupidsecurity.com/ as well.