It is pure disrespect to both the deceased and their mourners.
My FIL died suddenly last year and was very well known, liked and respected in his town. On the way there we had to pass road works and all the work men stopped what they were doing, bowed their heads and those wearing hats took them off. MIL was incredibly touched by that. Sadly, when we got to the church and parked up alongside it, a complete arsehole decided that when the family were standing around and FIL was being taken out of the hearse was the perfect time to walk past. He walked through the throng of mourners (like I say, FIL was very beloved, it was the biggest church in town and was so packed people were standing outside), pushing past some people, cut between MIL and the funeral director as he was explaining to her what was happening, then cut between the hearse and the family car behind to cross the road. Bastard was wearing a hat that he didn't take off either.
He could have crossed before reaching the church, he could clearly see we were blocking the path, why and therefore that we would be gone in a minute. There was a crossing 20 yards behind us, in the direction he approached from and once he had crossed, he carried on in a leisurely way so I doubt he had an emergency appointment to get to.
Unfortunately, my over riding memory of that day is the sheer disrespect of that man, not the workies downing tools for a stranger, the packed out church, the army of 16-20 year old lads from FILs training centre who had been given the day off but still chose to attend, many of them in their Dad's suits, just one man clearly old enough to know better.