TeeJay said:
In its current summit-hopping guise and in a UK context it can.
More than a UK context.
The Birmingham street party around the last UK G8 meeting was the first action around such a summit that I can recall.
And it was part of the Global Street Party. Which inspired Seattle. Which means that the recent events in Hong Kong are in a lineage directly traceable to RTS - and are rather more than "summit-hopping".
Also, the combined effect of this lineage has led to a sea-change in the internal politics of the WTO. See the accounts by small-country delegates in Seattle of looking at what was going on on the streets and realising that they had influence within the process - the actions de-hypnotised them, helping to expose US control of the process for the sham that it was.
Now, this reformist outcome was not the effect that RTS people were looking for. But it has had an effect on the politics of trade, may yet (relatively) improve the conditions daily of life of hundreds of millions of people, and has played its part in upsetting the previous
kind of US hegemony.
Back in the UK, government definitely thinks three times before proposing to bulldoze a road through a much-loved landscape. The Hastings Relief Road and the Birmingham-Manchester M6 widening/duplication are going to be interesting.
And as for genetically modified food...