Clearly, there is not going to be agreement but I don't think the vote SNP get the Tories line is either a lie or utter, utter, idiocy, but then I am not voting SNP.
To summarise, As has been discussed up thread, it is one possible scenario. Same as vote Lib Dem get the tories or Vote Green and get the Tories.
Also, in the interest of balance many post war elections for westminster went with SCOTLAND voting labour and getting the Tories.
Struck also by The Boy pointing out that the unionist party took the tory whip so the Tories need not venture North. However Winnie was the MP for Dundee back in the day.(1908-1922 as liberal)
Must Google the Unionist Party - quite interesting from 1912 to 1965 with historical links to the Liberal Unionist Party who fell out with the liberals over Ireland, presumably at the turn of the nineteenth century. According to wiki in 1974 their voters went to labour and theSNP (maybe the forefathers and mothers of the low taxation advocates in the SNP, now defunct?). The same wiki pages have some interesting old maps with SCOTLAND all dark blue in one of them except what looks like a couple of south lanarkshire constituencies in red and a couple of yellow liberal seats way up north. Glasgow still blue at this time due to rangers, empire, etc. From this single wiki article it does seem there were other elections where the 70 or so scottish Seats ( there were more is seats in the past) were divided amongst several parties without one being totally dominant. But then these big surges occur and labour became the dominant party in the last big surge.
And now in 2015 if polls right, the SNP are going to dominate. The other voices in the Yes campaign may benefit next year at Holyrood?