Yes, use of the word 'raid' is misunderstood by many.

While we can be going to a raid, the raid isn't the actual location itself. It's more going to participate in the activity of raiding at said location. When it is said "we're going to a raid" it's meant in the context of going to participate in the activity at that location, not calling the location itself a raid.

Unfortunately as this term is used in MMO's and people see it used for the first time they take it to mean that the location itself is a raid. This misunderstanding of the term is becoming much wider spread.

To use an example of a very similar word, it's like saying "I'm going to a protest". A protest isn't the location but the activity, yet people don't misunderstand this term as it's not frequenty used in MMO's to have it's meaning skewed.