LEG III ITAL ANT marching...

[Robert Vermaat]

Within the context and quite understandable for any German native speaker the statement means:
"Most reenactment groups don´t have the possibility to do what we do, and instead rather have to stand around decoratively..." to stress what a unique thing they are doing, not to degrade other groups.

Thanks Christian, for clearing that up. Indeed, the word 'können"/"can" could mean two things! And a singl;e sentence can easily starting a nasty rumour.. I'm glad you cleared that up. My apologies to Josef Löffl for making assumptions.