To be more precise, I'm not saying that because NATO is there that we are more prone to attack from Russia. I am saying that cyber-attacks are more possible in today's world, and Russia easily uses this because nothing keeps them from doing that. We just talked.... We have elections in Latvia this fall. A cyber-attack could be very small, or it could be as big as it was in the Estonian case when many government websites and systems were taken down for some days, and in some cases, even a week.
I doubt that they will do this because NATO troops are stationed in Latvia and they have no use for that. Now and then, they test us simply to see our weaknesses. I'm not talking about Latvia but the Baltic States, or Eastern Europe, or Europe in general, and North America. There's no reason, specifically, to attack Latvia.