It seems there is not spread enough fact that ethanol is poisonous even before denaturation. "The dose makes the poison." - the old medieval wisdom.
Most of denatured ethanol is mixed rather with relatively harmless chemicals of repulsive bitter taste, like denatonium aka Bitrex. Often in mixture with other denaturants, as skilled drunkards are inventive in alcohol purification. :
Denatonium ... is the most bitter chemical compound known, with bitterness thresholds of 0.05 ppm for the benzoate and 0.01 ppm for the saccharide.... Dilutions of as little as 10 ppm are unbearably bitter to most humans.... It is used as aversive agents (bitterants) to prevent inappropriate ingestion. Denatonium is used in denatured alcohol, antifreeze, preventive nail biting preparations, respirator mask fit-testing, animal repellents, liquid soaps, shampoos....... It is not known to pose any long-term health risks.
Methanol is added ( mixture known as methylated spirit ) usually to special lots for lab or technical usage where is implied the educated workers know what they are doing. The reason is methanol is one of the closest chemicals to ethanol, what is needed if usual additives would have disturbing effect due their physical or chemical properties. The methanol content is not very high, so toxicity of respective amount of methanol is comparable with toxicity of ethanol, for the given ratio.
The deadly cases in 2012 in Czech Republic were special, as evil motivated producers/sellers of cheap spirits mixed ethanol with methanol in ratio 1:1, not used in denaturation cases.
Pure ethanol is produced as well, but in limited scope, as danger of abuse is great.
There are various region specific denatured alcohol complex formulations as well, as example:
the formulation for completely denatured alcohol, according to 2005 British regulations was as follows: Completely denatured alcohol must be made in accordance with the following formulation: with every 90 parts by volume of alcohol mix 9.5 parts by volume of wood naphtha or a substitute and 0.5 parts by volume of crude pyridine, and to the resulting mixture add mineral naphtha (petroleum oil) in the proportion of 3.75 litres to every 1000 litres of the mixture and synthetic organic dyestuff (methyl violet) in the proportion of 1.5 grams to every 1000 litres of the mixture.
The European Union agreed in February 2013 to the mutual procedures for the complete denaturing of alcohol: Per hectolitre (100 L) of absolute ethanol: 3 litres of isopropyl alcohol, 3 litres of methyl ethyl ketone and 1 gram denatonium benzoate.