The governments toxicology profile on DNP covers just about every side effect ever documented in human both and animal trials. If you skip to around page 100 there are graphs with frequency and severity of side effects seen.
Hypoglycemia is not a known side effect.
http://www.atsdr.cdc.gov/toxprofiles/tp64-c2.pdf
The problem is people rarely use things in isolation and attribute effects to the wrong compound.
Tren and carb restriction were both mentioned which are common tools bodybuilders will use when dieting.
When doing restrictive carb diets during the transition phase into ketosis feeling dizzy or lightheaded was a common complaint when low carb diets became popular as you will have a brief period where the demand for ketones is not yet sufficient to meet energy demands and this manifests as symptoms people mislabel as going hypo.
One of the most common side effects of Tren is increased blood pressure. The most commonly used form of Tren is Tren Ace which has a short half-life. It's typically injected EOD. This leads to periods where the amount of Tren in the bloodstream is significantly higher the first day, lower the second, then spiked again the next. This translates to a similar effect on blood pressure simply meaning no matter what the total range of elevation is if you measure it over 48 hours you will see peaks and valleys as opposed to a smooth line. When BP changes rapidly common side effects are dizziness, transient fatigue, lightheadedness, shortness of breath, lethargy, and even fainting. Another series of symptoms that can be misconstrued as hypo.
DNP however is used far less regularly. It increases metabolic rate so energy levels drop faster. As well bodybuilders tend to use it in brief aggressive cutting phases with compounds like tren, multiple stimulants, thyroid meds, oral AAS, all of which can increase heart rate and blood pressure increasing the likelihood you will feel far worse and experience side effects than a slower less extreme cut which is probably what they mentally are comparing as a baseline.
DNP does not cause you to go hypo however I can see how people attribute side effects to DNP that it does not cause. This is true for a myriad of other compounds discussed on boards. People attribute side effects or even benefits to the compound they have used to least because it's simply the one they have the least experience with so it "must" be that particular compound.