They don't need to be consistent, though. They can pick on anyone who breaches a regulation and whoever that is has no real cause for complaint. Same way that while the vast majority of speeding motorists get away with it, and despite the fact that speed traps will often ignore offenders, if you are the one that gets done, you have no real grounds for complaint.
For all that, and my facetious comments, I am actually on the side of the fans (including you) who think that the goverment, police and clubs have gone too far in their stewarding of fans. I'm old enough to have enjoyed standing on the terraces and changing ends at half time. The way to deal with that, however, is to get the regulations changed, not to act like some 13 year old, entitled kid. Rosa Parks this is not.
Unfortunately, it's very easy for the authorities to hark back to the days of drunk, sectarian numpties causing all sorts of problems around the country. Then there was the Casuals movement, plus the Hillsborough and Bradford disasters that had the government of the time (who despised football and its fans with a passion) overreact.
Every time fans run onto the pitch, or ignore stewards instructions or get into fights, it plays directly into the anti-football mob (which is signifcant) and ensure the restrictive regulations remain in place.
The way to get some sanity back into the game is to suck up the current restrictions while actively working to change them. That will take a coordinated and concerted effort, but it can be done. Look at how we, the fans, influenced the decison to keep Newco Rangers out of the top flight. A similar, sustained effort aimed at the Scottish government might produce similar results - if not quite as quickly.