Joe,Joe, Joe...
You've got 2 errors there and as a scientist I'm entrusted to keep facts straight. These are all Physical Chemistry Facts that you can test in your kitchen so no debate about them...
1st: Water is one of the few compounds that SWELLS as a solid, so when a FLOATING CHUNK of ice melts, there's LESS volume of liquid water. If you look carefully at the photo you'll see that the water level actually dropped a bit. Water swells 9% upon freezing, but the photo doesn't seem to show a 9% drop in volume because the floating ice displaced a volume of water equal to its weight, which in the case of water is equal to its volume...
2nd: Now before you go off thinking that melting the glaciers will DROP sea levels please notice that I said FLOATING ice. The vast major of earth's glacial ice sheets are on land, so as they melt they'll deposit all that terrestrial-based water into the oceans, RAISING the sea levels.
But wait, there's more. The weight of ice sheets that can be miles thick, compresses the ground below them. As they melt the compression forces abate so the depth of the water decreases, increasing the water level.
OK, I got too technical so here's the Readers Digest Version: Basically earth's water has stayed constant over the eons. At the height of the last ice age those massive glaciers contained enough water to drop sea levels by 100s of feet. As they melted the water ran off the land into the oceans so sea levels rose, and will continue to rise if the land-based glaciers continue to melt. So who are the #IDIOTS you figure cites??