Also, I think I heard it on here actually, that government agencies are collecting so much data it almost bogs them down. Chances are they won't notice you, and even if they did, I think they could tell the difference between a one time click and an actual trend in behavior. At least, I hope they can tell.
And I hope they can tell when many users add the same searches around the same time to exclude trends that may be due to something other than interest in the search results. Trends like a link being posted across social media.
This is more of my point. I don't think that authorities will show up at your door for making random searches. But if someone wants to mess with you and knows you did this, you have a bit more explaining to do than if you hadn't. Any cast of suspicion is another obstacle you'd have to overcome to have people dismiss the claim, regardless of how unwarranted the claim may seem.