We could wait for sixty trazybillion years before TGHQ gets rid of the men at the top, so this is how to do it yourself.
First, you'll need FireFoxy, next, the Adblock add-onhttp://adblockplus.org/en/
Install that and restart Firefoxy
Next, load the forum and right-click on the banner (the man or three men etc.) at the top
select from the context menu, "Adblock Plus: Block Image"
The filter rule will then pop up
Select "Custom" and replace the numbers indicated by the red arrows by asterisks.This will block all the header graphics on all the Travian Forums.
Click F5 to refresh the page and the forum header will look like this:
The man at the top has been burnt with fire \o/Yay
Just for reference, these are the headers it will also currently block, including the hidden one.
Credit & Thanks: RedShield (travian.com forum)