As far as i'm concerned, i've always liked the way you post. I can't recall any instances in which I perceived any as your posts a being spammy.

I don't want to dig into this particular occurence, but i can say i've been called a sigspammer a couple of times, usually when having a discussion with somebody that was losing said discussion (at least from my point of view). I've always seen these shout-outs as a hail-mary pass.
I guess the general idear is: "I don't agree with this user, but i cannot win this discussion, so i'll point out this user is wearing a signature instead and hope other people will change their point of view towards my opponent and also brand him a sigspammer. Thus avoiding the valid points he/she is making in this discussion".
Once again: i don't know if this was the case here, it's just something that has happened to me a couple of times before.