The question is, is their purpose to influence scottish people, or iranian people?
General disruption in the UK would help the Iranian government a little, but I managed to click on one of the accounts before it was suspended, and its most popular tweets received very interaction (and were pretty banal statements of independence support indistinguishable from stuff thousands of completely normal Scottish people posted) I assume their attempts to seed wilder rumours were low effort and had very little success.
- It took on all the sovereign debt from the newly independent nations.
- It relinquished nukes that were left behind in Ukraine.
- The United Nations collectively agreed to it.
I don't think any of those things would happen in the UK's case. But of course it doesn't matter what you or I think. It only matters what _Iran_ thinks will happen if Scotland gains independence.
Or as some wags have put it, when Northern Ireland unifies with the Republic of Ireland, and Scotland joins the EU as an independent state, the Rump UK (1) becomes the "Former United Kingdom of Wales and England" (2), or "FUK-Wangland" for short.
1) https://en.wikipedia.org/wiki/Rump_state
2) See FYROM: https://en.wikipedia.org/wiki/North_Macedonia#Naming_dispute
This is a tool of international competition and the U.S. and U.K. have been trying to do it to Iran (and others) for even longer than the reverse.
Perhaps they mean to influence Iranians who activity circumvent internet restrictions :-)
It may be aimed at Scots but sometimes be done too blatantly so slips into the implausible. It may be aimed at influencing just those prone to conspiracy theories - who might be few but more likely to extreme actions.
Its quite unusual for separatist movements to both remain peaceful themselves, and not to be violent suppressed. Even other western democracies have not managed, nor did one other part of the UK for a long time.
My other nationality is Sri Lankan so I have seen how bad it can get. I do not think that will ever happen in the UK, but even a very small number of sufficiently nasty people can do a great deal of damage.
I think there are parallels to draw to how Fox News tried to paint a picture of places in Europe being on fire and overtaken by gangs and radicals years before that became close to actual reality.