Absolute rubbish
If you can judge that somebody is really travelling that much faster than you, you shouldn't be on the motorway.
The difference between 70mph and 100mph really isn't that big, if you're indicating for a few seconds like you should be that gives the 100mph driver adequate time to slow down and avoid an incident.
If you're really just pulling out infront of people with only 1-2 seconds to judge the situation, you're the dangerous one.
Exactly. The morale highgrounding on this forum these days is ridiculous. Everybody are angels apparently.