The aerobatics are usually in one place, so it isn't too hard to work out where to avoid.
I do think they could improve the way they report the Red Arrow routes though, you pretty much have to mark out each lat/lon and draw the lines on the chart. Presumably they have already done that on their chart, so why not put it online? I appreciate that the NOTAM's are very telex friendly in a way that charts are not, but many people have moved on from telexes these days.
IO540, I think it might be more like 1000 degrees Celsius, but I take your point.