I do not blame VLSI for venting his frustration. Nothing is worse than seeing 1 hour hard labor (listing shirt, taking pics and careful measurements etc...) get flushed down the toilet by some whiney crybaby buyer who did not bother to check measurements. I am 100% on VLSI's side here. It is not like he screwed up or had an honest misunderstanding with his buyer. The buyer was a selfish and inconsiderate asshole who refused to take responsibility or man up to his mistake.
In reality, the buyer should have had the courtesy to ask the seller if he may return the shirt for a partial refund. Partial refund means covering the seller's eBay expenses and the seller postage costs (where buyer has to also pay for return postage).
I have done this before to a seller when I made a slight error. I emailed the seller explaining my mistake, highlighting I expected nothing from the seller given he covered his end, but I would in the event of a return cover all his expenses deemed out of pocket. I ended up getting around an 85% full refund and seller was quite happy to do this. Seller relisted and sold the item a week later for a little more than when I won the auction. I still deal with this seller today and he is more than happy to do "off eBay record" transactions. When I proposed the return he immediately said he thought I was an awesome buyer and he would be more than happy to proceed.
Bottom line, Sellers have to treat Buyers well, and Buyers have to treat Sellers well. The eBay world would be a much better place if this was observed.
Instead we have sellers shitting bricks with every transaction and a non zero percentage of buyers looking to exploit any loophole they can. At least 90% of buyers are fine, shame about the 5 - 10% of aholes out there.