Anyone thinking about tax loss harvesting on SLTD does have to be aware of the wash sale rules, as you mention. However, they should do their own research and/or seek professional tax advice.
I think you also cannot claim a tax loss if you purchased the stock within 30 days prior to selling it, in addition to repurchasing within 30 days. Don't take my word for it, but that is my recollection from reading about it in the past.
Also, fairly sure there is no limit to the investment loss you claim, if you are using it to offset investment gains.
My opinion, it's a bad idea to sell for tax losses if you plan to just buy back into the same stock in the near future. Of course, you don't lose the right to bank the loss forever if the wash sale rule gets you; the loss just gets factored into the cost basis of your new purchase.
Tax season - until now a real pleasure As I am still red I too expected a sell off due to tax reasons. I do not have a clue why we are climbiong. Nevertheless I enjoy it on a lovely warm evening here in bavaria (9°C, no snow for christmas, the alps are grenn up to 1500m).