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This is about the funeral though, not protests about cuts to the disabled.
On a general note though, taking part in a peaceful process is very different from putting yourself in harm's way if there are idiots about intent on just causing trouble and criminal damage.
Having seen some of the things I have round here, and ending up in the middle of two mobs when the Manchester riots kicked off, I was terrified and it's not an experience I wish to repeat. Being disabled, it's not like I can get out the way (or anywhere) very fast and don't fancy my walking stick being viewed as a potential weapon.