Wikipedia has the following:

http://en.wikipedia.org/wiki/Scots_Wha_Hae

and the BBC History section has the following page:
Enlightenment Radicals

"when 16 000 protested in Paisley, and the band was arrested just for playing Burns' 'Scots Wha Hae'"

The only caveat I'd make with regard to the band being arrested in Paisley is that I'm sure I have seen a similar story about a band in Wishaw or Airdrie. Can't trace it at present.

But it seems that the Establishment clearly regarded Scots Wha Hae as expressing seditious sentiments in its own right. Whether that can be linked to its creation as a covert tribute to Muir, or simply due to the way it was being used at political gatherings, may not be established.

Regards


Steven C