Ethylene glycol is anti-freeze and I'd druther not drink it 'cause enough would kill ya. I don't know about PEG, so I looked it up:

Wikipedia: PEG is traditionally also one of the main ingredients in Paintball fill because it is thick and flexible. However, as early as 2006, some Paintball manufacturers have been substituting PEG with cheaper alternatives.

PEG has also been used to preserve objects which have been salvaged from underwater, as was the case with the warship Vasa in Stockholm, and the Mary Rose in England. It replaces water in wooden objects, which makes the wood dimensionally stable and prevents warping or shrinking of the wood when it dries. Additionally, PEG is used when working with green wood as a stabilizer and to prevent shrinkage.

Here's the data on toxicity: ORAL (LD50): Acute: 30200 mg/kg [Rat] 28915 mg/kg [rabbit]. Thus, if you weigh 100 kg you would need to ingest 29,558 mg (or about 1.04 ounces Avoirdupois) of "the pure" to kill off 50% of yourself.

It's also suggested that in the event of a "large" spill (whatever that means) you provide yourself with splash goggles, full suit, vapor respirator, boots, and gloves; a self contained breathing apparatus should be used to avoid inhalation of the product.

Since this is would be used as a laxative I'd think the boots would be the most important item.

Now tell the truth: ain't you glad I'm around to fill you in on stuff like this?